Binary to hex converter
Convert between binary, decimal, hex and octal for code and registers.
Category
Tech Converters
Tech calculators: download time, file size (KB/MB/GB/TB), bandwidth, voltage drop, LED resistor and battery capacity. Built for IT and electronics work.
Last updated: June 2026
Technology runs on a handful of unit relationships that regularly trip people up: bits versus bytes, the base a number is written in, and the basic electrical formula behind a circuit. The tools here cover the conversions that come up while you are actually doing something, whether that is estimating a download, reading a register value in hexadecimal, choosing an LED resistor, or checking that a long cable run will not lose too much voltage.
The one relationship worth memorising is that a byte is 8 bits. Internet plans are sold in megabits per second, but files are measured in megabytes, so a connection's headline number is always eight times larger than the download speed your file manager shows.
Tools in this section
Mbps to MB/s
Turn an internet plan in Mbps into real file speed in MB/s.
Download time calculator
Estimate how long a file takes to download at a given speed.
HEX to RGB colour
Translate web colour codes between hex and RGB channels.
Hz to kHz converter
Convert between Hz, kHz, MHz and GHz for signals and audio.
Ohm's law calculator
Solve voltage, current, resistance and power from any two values.
Voltage drop calculator
Check how much voltage a cable run loses over distance.
Internet speed in real terms: Mbps to MB/s
Plans are sold in megabits per second (Mbps) but files download in megabytes per second (MB/s). Because a byte is 8 bits, divide the plan by 8 for the theoretical maximum; real speeds run a little lower after protocol overhead.
| Plan (Mbps) | Max (MB/s) | Realistic (MB/s) | 1 GB file |
|---|---|---|---|
| 10 | 1.25 | ~1.1 | ~15 min |
| 50 | 6.25 | ~5.6 | ~3 min |
| 100 | 12.5 | ~11 | ~95 sec |
| 500 | 62.5 | ~56 | ~19 sec |
| 1000 | 125 | ~112 | ~9 sec |
Number systems and electrical units in practice
Two confusions come up constantly in tech work. The first is binary versus hexadecimal. Binary is how processors and memory actually store data: every register, flag and bitmask is ultimately ones and zeros. Hex compresses that by four: one hex digit represents exactly four binary bits, which is why memory addresses, error codes and CSS colour channels are all written in hex. Seeing 0xFF and knowing it is 255 in decimal (and 11111111 in binary) is the mental shortcut that makes register-level reading fast.
The second confusion is kilo versus kibi. Hard drive makers use 1 KB = 1,000 bytes (decimal); operating systems use 1 KiB = 1,024 bytes (binary). A drive advertised as 1 TB appears as about 931 GiB in Windows or macOS. Neither is wrong; they use different definitions. For file-transfer estimates, the binary KiB/MiB/GiB is what matters because that is what your OS reports.
The electrical tools here rest on one equation: V = I × R (voltage = current × resistance). An LED resistor calculation, a voltage drop check for a long cable run, and an Ohm's law problem are all the same algebra with different labels. If you know any two of voltage, current and resistance, you can find the third. That is why those three calculators all live in the same section.
Frequently Asked Questions
Why is my download slower than my internet plan?
Plans are advertised in megabits per second (Mbps) but downloads are shown in megabytes per second (MB/s), and a byte is 8 bits. Divide your plan by 8 to get the real maximum: a 100 Mbps line tops out near 12.5 MB/s, usually a little less after overhead.
What is the difference between MB and Mbps?
MB (megabytes) measures file size or stored data; Mbps (megabits per second) measures transfer speed. Because a byte is 8 bits, an internet speed in Mbps is eight times the file speed in MB/s. The two are easy to mix up because the letters look similar.
How do I convert a hex colour code to RGB?
Split the six-digit hex code into three pairs, one each for red, green and blue, and read each pair as a number from 0 to 255. So #FF5733 is red 255, green 87, blue 51. The colour converter does this both ways.
How do I convert binary to hexadecimal?
Group the binary digits into blocks of four from the right, then replace each block with its hex digit, because one hex digit equals exactly four bits. So 1011 0010 becomes B2.
What does voltage drop matter for?
Every cable has some resistance, so a long run loses voltage between the source and the load. It matters most for low-voltage DC and long distances, where too much drop can leave a device under-powered. The voltage drop calculator sizes the wire to keep the loss acceptable.